Github user JoshRosen commented on a diff in the pull request:
https://github.com/apache/spark/pull/3633#discussion_r21565347
--- Diff: core/src/main/scala/org/apache/spark/rdd/CoalescedRDD.scala ---
@@ -55,9 +54,11 @@ private[spark] case class CoalescedRDDPartition(
* @return locality of this coalesced partition between 0 and 1
*/
def localFraction: Double = {
- val loc = parents.count(p =>
- rdd.context.getPreferredLocs(rdd, p.index).map(tl =>
tl.host).contains(preferredLocation))
-
+ val loc = parents.count { p =>
--- End diff --
Ah, just saw the comment from your earlier discussion with @dgshep on one
of the earlier commits. Yeah, I see now that `exists` isn't a loop. Feel free
to ignore this comment unless you think my version is more readable.
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